Hello all, It turns out that me selling my Quad is not easy and shipping costs are ridiculous (especially for what I would be including in the sale). So what I'm hoping to do is find a way to decrease energy consumption of the Quad and turn it into....a dual 2.5. What I am wondering is: If it is possible to shut off one of the cores, will that possibly decrease energy consumption by at least 40%? If so, how would I go about doing that? I cannot afford a "new" Mac, upgrades/repairs to my PowerBook, and shipping the quad with peripherals is almost prohibitively expensive. Any ideas? I know I would be losing a lot of power, but even a dual 2.5 with 8GB RAM and a good GPU is far better than a single 1.25 with only 512MB RAM and so far kind of slow at everything. Thanks in advance for any assistance/clarification/education...etc.